Answer: The part of the atom that is involved in chemical bonding with other atoms is the electron.
Explanation: An atom is composed of three particles: protons, electrons and neutrons. The protons and neutrons occupy the nucleus while the electrons occupy the electron shells. During chemical bonding, electrons are either transferred from one atom to another or electrons are shared between two atoms. A type of chemical bonding in which valence electrons are transferred from an atom of a metal to an atom of a metal in order that both will attain a stable structure of noble gases is called electrovalent or ionic bonding. A type of chemical bonding in which there is sharing of electrons between two atoms of non-metals so that the two of the can attain a stable structure of noble gases is called covalent bonding.